GVim Portable Installation
The latest Portable GVim downloads can be found on the GVim Portable website http://portablegvim.sourceforge.net.
The GVim Portable downloads page lists available packages.
The installation is very easy. Just download a self extracting package (or a zip file) and save it to your hard drive. After that you can extract the content via doube clicking the exe file. Extract the content to your usb drive. This will create a GVimPortable directory on your usb drive. Change to that directory und run the application by double clicking on GVimPortable.exe.